linux-kernel - [LKP] [kernfs, sysfs, cgroup, intel_rdt] a8c7fe83d1: BUG:kernel_hang_in_test

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Message-ID: <20180911051558.GK1110@shao2-debian>
Date:   Tue, 11 Sep 2018 13:15:58 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        LKML <linux-kernel@...r.kernel.org>,
        David Howells <dhowells@...hat.com>, lkp@...org
Subject: [LKP] [kernfs, sysfs, cgroup, intel_rdt]  a8c7fe83d1:
 BUG:kernel_hang_in_test_stage

FYI, we noticed the following commit (built with gcc-6):

commit: a8c7fe83d17109b77c7b27a23140e76d3753fa6a ("kernfs, sysfs, cgroup, intel_rdt: Support fs_context")
https://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git btrfs-mount-api

in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 2G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------------------------------+------------+------------+
|                                                                  | 88ed9083f5 | a8c7fe83d1 |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 2          | 0          |
| boot_failures                                                    | 10         | 10         |
| BUG:KASAN:null-ptr-deref_in_n                                    | 10         |            |
| BUG:unable_to_handle_kernel                                      | 10         |            |
| Oops:#[##]                                                       | 10         |            |
| RIP:nfs_fs_mount                                                 | 10         |            |
| Kernel_panic-not_syncing:Fatal_exception                         | 10         |            |
| BUG:kernel_hang_in_test_stage                                    | 0          | 8          |
| invoked_oom-killer:gfp_mask=0x                                   | 0          | 2          |
| Mem-Info                                                         | 0          | 2          |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0          | 2          |
+------------------------------------------------------------------+------------+------------+



[   17.521153] random: get_random_bytes called from flow_hash_from_keys+0x3e9/0x480 with crng_init=0
[   17.526197] random: get_random_bytes called from addrconf_dad_kick+0xf7/0x1a0 with crng_init=0
[   55.227136] random: get_random_bytes called from __prandom_timer+0x57/0xc0 with crng_init=0
[  442.854487] random: fast init done
[  880.187591] random: crng init done
BUG: kernel hang in test stage

Elapsed time: 2690

#!/bin/bash



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong, Chen

View attachment "config-4.19.0-rc1-00110-ga8c7fe8" of type "text/plain" (104198 bytes)

View attachment "job-script" of type "text/plain" (4223 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (11000 bytes)